Note 9 - Product Warranty Obligations (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	Year Ended December 31,
	2018			2017			2016
Balance at beginning of period	$	35,422		$	31,695		$	30,197
Product warranty reserve assumed in acquisition		-			43			840
Payments		(20,029	)		(18,861	)		(18,691	)
Provision for warranty issued		26,910			21,347			19,148
Changes in estimates for pre-existing warranties		(518	)		1,198			201
Balance at end of period	$	41,785		$	35,422		$	31,695

	Year Ended December 31,
	2018			2017			2016
Balance at beginning of period	$	57,854		$	36,139		$	31,956
Deferred revenue contracts issued		21,440			29,262	(1)		9,797
Amortization of deferred revenue contracts		(10,954	)		(7,547	)		(5,614	)
Balance at end of period	$	68,340		$	57,854		$	36,139

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]

2019	$	13,438
2020		13,547
2021		12,178
2022		9,756
After 2022		19,421
Total	$	68,340

Product Warranty Obligations Included In Consolidated Balance Sheet [Table Text Block]

	December 31,
	2018		2017
Product warranty liability
Current portion - other accrued liabilities	$	25,396	$	20,576
Long-term portion - other long-term liabilities		16,389		14,846
Total	$	41,785	$	35,422
Deferred revenue related to extended warranties
Current portion - other accrued liabilities	$	13,646	$	11,017
Long-term portion - other long-term liabilities		54,694		46,837
Total	$	68,340	$	57,854